Get it Tomorrow. Okay, you Brownstone. Turbo Poly Seal is not sold in Home Depot or Lowe's Turbo Poly Seal does "Skin over" during transit in the can. Fast Turnaround. Turbo Poly Seal is a Polyurethane base paint on product flashing and roof repairs on all roofs. Jörgen Bergström, in Mechanics of Solid Polymers, 2015 . This product is unique because the composition is polyurethane and bituminous resins and will adhere to almost any surface. There is 1 item in your cart. Lowe's offers a range of top-quality finishes sure to help your floors last, including polyurethane, varnish, lacquer, acrylic, resin and more. Fast Turnaround. Color: Brown. Overview of Flex Seal. Find here Packaging Pouch, Flexo Packs, Pesticide Pouches suppliers, manufacturers, wholesalers, traders with Packaging Pouch prices for buying. We offer the finest turbo poly seal and super silicon seal products to help you fix your leaking roofs. Turbo Poly Seal · Use a steel wire brush to scrub the surface. 8 (10,145) $5999 $79. 2019-08-06 12:20:05. This sealant dries clear making it nearly impossible to see. Please watch: "Fast Cheap Easy Flat Roof Install - Will last 30 years - Start to Finish - Wife and Me only - DIY" https://www. Covalent Attachment of Poly(ethylene glycol) to Surfaces, Critical for Reducing Bacterial Adhesion Peter Kingshott,*,† Jiang Wei,† Dorthe Bagge-Ravn,‡ Nikolaj Gadegaard,† and Lone Gram‡ Danish Polymer Centre, Risø National Laboratory, Building 124, P. Turbo Poly Seal 2 Gal – 2. All roofs need some repairs whether it be flashing, drains, skylights or chimneys that cause leaks. Main Material, Brass, Plastic, Poly, ETFE . Hello Select your address All. It’s usually water-based to thin the rubber and make it easier to apply. Apr 30, 2013 · Hello all, I am trying to write some postprocessing code to compute deformation gradient in an ABAQUS Model. Ideal for light duty palletizing, carton closing, and bundling. · To seal Chimney Crowns and Flashing · Metal Roof Seams, screw seal · To patch or seal over cracks on . Find My Store. The transition between the metal and the mortar. Within the two main categories, there are five types of roof sealants: acrylic, polyurethane, silicone, rubber, and sealant tape. It will adhere to almost any surface like metal, asphalt, bitumen rubber, TPO membrane, glass. Apr 5, 2022 · Poly Strapping Seals are made from galvanized metal with a smooth inside surface which clutches to the poly strapping. We also use the gutter sealant to top caulk joints between metal guttering pieces. 5″ wide x 50 ft long Life Expectancy: 8 -12 years if not protected with Silver Coat Protection or oil-based paint 30 minutes of curing time before the rain 24 hours curing Shelf life after opening: 1 month (properly sealed) for skylights – use Super Silicone Seal. Prior Lake, MN. de 2018. 9 × 5 × 6 in. Turbo Poly Seal does “Skin over” during transit in the container. 16 de fev. Kool Seal 1-Gallon White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # KS0064800-16 Find My Store for pricing and availability Multiple Sizes Available Gaco 1-Gallon White Silicone Reflective Roof Coating (50-year Limited Warranty) Model # GACSRC1 Find My Store for pricing and availability 16 Gaco. Please watch: "Fast Cheap Easy Flat Roof Install - Will last 30 years - Start to Finish - Wife and Me only - DIY" https://www. Prior to the conceptualisation of BRS, research by Bergström and Boyce (1998,. You can paint over Turbo Poly Seal Coverage: approx. Cut Fleece to size and apply over resin. Flat Roof Leak Repair with Turbo Poly Seal - https://youtu. Fun pillow, nice size and good quality. Most were exposed during the wire brushing with an. For skylight repairs you should use Super Silicone Seal. This permanently flexible joint filler was developed for. synthetic twinning, predominantly after the albite twin law. , Cheng Z. $ 157. This composition stays elastic over time and is also very strong. Products are sold as seen on the page, no variations. When autocomplete results are available use up and down arrows to review and enter to select. Turbo Poly Seal is applied via brush or roller. This type of sealant comes as a liquid form of rubber. When applied with a Polyester fabric, it gives it. Poly Fleece • Sand the PVC pipe. We stock this product for use in both our residential and commercial guttering jobs. Contains aluminium - so you can repair metal with metal. Including glass fibre, it is the worlds perfect repairer for bridging holes & gaps. 884 Tropi-Cool 100% Silicone Roof Sealant Seal your roof like a pro with Henry 884 Seal your roof like a pro with Henry 884 Tropi-Cool 100% Silicone Roof Sealant. Ecommerce; ps5 says cannot start game or app. Apr 30, 2013 · Hello all, I am trying to write some postprocessing code to compute deformation gradient in an ABAQUS Model. BLACK JACK. gifts for 11 13 year olds girl testicle festival montana 2023 mackinac island hotels on the water spy training school serves as a notification to the agency for. Load Capacity. Products are sold as seen on the page, no variations. $ 157. There is 1 item in your cart. Jan 21, 2023 · Bergstrom Industries is a roofing product store that has been providing the best flat roof repair products and flat roof waterproofing products in Hocking State Park,. Turbo Poly Seal is not sold in Home Depot or Lowe’s Turbo Poly Seal does "Skin over" during transit in the can. Jan 21, 2023 · Bergstrom Industries is a roofing product store that has been providing the best flat roof repair products and flat roof waterproofing products in Hocking State Park,. Find My Store. The lid screws onto the base to provide a leak-proof seal. PA 15666 Tel: (203) 858-0080. Tensil Strength (lbs. However, this does not impact our reviews and. Business listings of Packaging Pouch, Flexo Packs manufacturers, suppliers and exporters in Bengaluru, Karnataka along with their contact details & address. This sealant is not as thick as regular metal roof sealant so it moves and spreads out in joints between metal pieces creating a consistent watertight gasket. Available Colors: Transparent. Bergstrom International Ltd,. Cut Fleece to size and apply over resin. 5048 Page. Turbo Poly Seal 1/2 Gal /Silver Coat 1 Pint/ 25 Fleece/ Brush. Flat Roof Leak Repair with Turbo Poly Seal - https://youtu. Sep 11, 2022 · Brush 1 thick coat either the Turbo Poly Seal or Super Silicone Seal on both sides of crack or seam. Type of Pouch: Flat Pouch. From: $ 124. Cf: Medinan. All roofs need some repairs whether it be flashing, drains, skylights or chimneys that cause leaks. Dicor Self-Leveling Lap Sealant. Poly Fleece Rolls are designed to provide strength and flexibility when used with Turbo Poly Seal and Super Silicone seal, Xtreme Silicone Seal Used over seams, flashing, chimney. , Cheng Z. booster pump 90°, 1" inlet, Bergstrom Booster Pump, Kysor Pump, Water Pump,. Feb 10, 2023 · Turbo Poly Seal Water Sealant – 6 steps Read More » Silver coating The question is which brand Silver Coating to use when it comes to protecting your roof against Ultraviolet. Flex Seal, Turbo Poly Seal, Super Silicone Seal comparison and flexibility and strength test Flat Roof Doctor 36. Turbo Poly Seal is a Polyurethane base paint on product flashing and roof repairs on all roofs. T urbo Poly Seal is a combination of Bituminous and Urethane resins. Feb 9, 2023 · To solve the CTE mismatch problem resulting from Mould cap Die Wire bond assembling the flip-chip with a polymer-based organic substrate, the simplest and most cost-effective approach is Die attach to fill the gap between the chip and the organic substrate with an appropriate composite to transfer the thermal– mechanical stress away. Turbo Poly Seal is not sold in Home Depot or Lowe’s Turbo Poly Seal does "Skin over" during transit in the can. by ClassicLiving. Turbo Poly Seal was designed to address all leak problems. Most were exposed during the wire brushing with an angle grinder and cupped wire wheel. Main Material, Brass, Plastic, Poly, ETFE . Albite crystals frequently exhibit poly- (above Cincinnatian of Ordovician, below Niagaran). rockwood mini lite 2104s singing news radio schedule american standard mainstream toilet reviews does gabapentin increase dopamine levels pylontech h48050 datasheet. These smooth seals offer great seal efficiency. Turbo Poly Seal 1/2 Gal /Silver Coat 1 Pint/ 25 Fleece/ Brush. Obsolete syn. GE Advanced Silicone 2 10. From: $ 124. de 2015. de 2018. ₹ 180/ Kg Get Latest Price. It is versatile, and the roofing tar can be used to seal leaks in both wet and dry surfaces. APOC EverClear Waterproof Elastomeric Cement Roof Sealant. Type of Pouch: Flat Pouch. A variety of surfaces can be coated with it, including metal, wood, plastic, and concrete. Spend less. 5-Gallon White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # KS0064800-20. 3) is this the correct way to go at this repair? I had originally planned to use Poly Turbo Seal; however, Henry’s #884 silicone roof sealant has already been applied to the leaking joint and I understand Poly Turbo Seal will. The ultimate product for rusted out metal, dents, cracks, holes & tears in broken & shattered fibreglass, wood, stone, concrete & aluminium. Stewart A. When applied with a Polyester fabric, it gives it. de 2019. Turbo Poly Seal is a Polyurethane base paint on product flashing and roof repairs on all roofs. There are 0 items in your cart. Box 49, DK-4000 Roskilde, Denmark, and. Heat Seal. Bergstrom Industries January 15, 2020 Dab the fleece with the brush into the layer of Super Silicone Seal coating. Turbo Poly Seal is catalyzed with Turbo catalyst powder and combined with Poly Fleece reinforcing fabric to form a flexible, monolithic, reinforced membrane. It will adhere to almost any surface like metal, asphalt, bitumen rubber, TPO membrane, glass. Depending on the product, roof sealants can provide a protective seal against moisture. Super Silicone Seal has been formulated to protect all roofs against heat and ultraviolet. Turbo Poly Seal does “Skin over” during transit in the container. This sealant is not as thick as regular metal roof sealant so it moves and spreads out in joints between metal pieces creating a consistent watertight gasket. The most common ratio is a 65-percent cotton and 35-percent polyester blend, but 50/50 blends are used as well. Opens in a new tab. Bergstrom Industries January 15, 2020 Dab the fleece with the brush into the layer of Super Silicone Seal coating. When applied with a Polyester fabric, it gives it. 27,960 m−1 cm−1 for the NDM variants without the poly-His tag. GE Advanced Silicone 2 10. This sealant is not as thick as regular metal roof sealant so it moves and spreads out in joints between metal pieces creating a consistent watertight gasket. Feb 7, 2020 · Polyethylene glycols (PEGs) with molecular weight of 5-, 20-, and 40-kDa were used as model drugs, which can represent the common size range of hydrophilic macromolecular drugs using TSHG. 11 likes. This sealant dries clear making it nearly impossible to see. Turbo Poly Seal is a Polyurethane base paint on product flashing and roof repairs on all roofs. 312-322-10) which can be. , VanPelt J. com 850 Greenlick Hollow Rd. 6-quart White Silicone Reflective Roof Coating (Lifetime Warranty) Model # 5576-1-20. Turbo Poly Seal 1/2 Gal /Silver Coat 1 Pint/ 25 Fleece/ Brush. Kool Seal 1-Gallon White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # KS0064800-16 Find My Store for pricing and availability Multiple Sizes Available Gaco 1-Gallon White Silicone Reflective Roof Coating (50-year Limited Warranty) Model # GACSRC1 Find My Store for pricing and availability 16 Gaco. Turbo Poly Seal is not sold in Home Depot or Lowe’s Turbo Poly Seal does "Skin over" during transit in the can. 6-Quart Fibered Waterproofer Cement Roof Sealant Find My Store for pricing and availability 363 APOC EverClear Waterproof Elastomeric Cement Roof Sealant Model # AP-5070-0-61 Find My Store for pricing and availability 88 APOC. You may find that the Gorilla silicone caulk is helpful for your fall chores. Construction: Handmade: Tufted; Opens in a new tab. You can use it on every surface like chimneys, asphalt, tar, and metal. This product works with exterior and interior materials. SAFETY DATA SHEET Turbo Poly Seal SECTION II: HAZARD(S) IDENTIFICATION DANGER Highly flammable liquid and vapour. Jan 25, 2023 · 6912 Langmuir 2003, 19, 6912-6921. org Directors, Class2: Dave. The flat-woven rug is made from 100% polypropylene and is very versatile. rockwood mini lite 2104s singing news radio schedule american standard mainstream toilet reviews does gabapentin increase dopamine levels pylontech h48050 datasheet. The answer to your question is affirmative, storage and loss modulus are intrinsic property of the material, completely geometry-independent. 4 de set. Feb 1, 2023 · In contrast, Na-bentonite and superabsorbent polymer (similar to the polymer in BPC) permeated with the same solutions had hydraulic conductivities at least three orders of magnitude higher. Opens in a new tab. 5-Gallon White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # KS0064800-20. com/pd/Blue-Hawk-Stainless-Steel-Coarse-Wire-Brush/50021974 2. Bergstrom Industries January 15, 2020 Flashing detail to a. White Super Silicone Seal Waterproofing Roof leak Repair 1/2 Gal + 25 ft Poly Fleece. Poly-resin, or polyester resin, is the one of the most commonly used moldable plastics. for pricing and availability. Log In. Turbo Poly Seal 1/2 Gal /Silver Coat 1 Pint/ 25 Fleece/ Brush. Turboseal. gifts for 11 13 year olds girl testicle festival montana 2023 mackinac island hotels on the water spy training school serves as a notification to the agency for. Eterna-Kote 3. GE Silicone 1 Clear All Purpose Sealant 10. Turbo Poly Seal – water sealant – Bergstrom Industries. 76 after $25 OFF your total qualifying purchase upon opening a new card. 1986-2000 C500, K100E, W900B, T-Series Blower Switch (BERGSTROM A/C) 652090. Plain Glossy LDPE Clothing Packing Bags, Heat Sealed. You may even fix your leaky helmet with this glue. Turbo Poly Seal · Turbo Poly Seal 1 Gal for metal roof repairs and chimneys · Turbo Poly Seal and Poly Fleece to use for repairs on flat roofs, metal roofs · Turbo . Society for Integrative and Comparative Biology with the Animal Behavior Society American Microscopical Society The Crustacean Society 2013 SICB Annual Meeting 3-7. A sealer protects your wood from damage, both from moisture and from scratches and scuffs. Polycrylic Clear Satin Water-Based Polyurethane (1-Quart) Model # 63333444. Feb 10, 2023 · Turbo Poly Seal to make any leak repairs August 26, 2019; Super Silicone Seal August 20, 2019; 5 Secrets How to Find and Fix Leaks on a Roof August 18, 2019;. Unlike the products. org Young Eagles Dir: Scott Hanson youngeagles@eaa54. GE Advanced Silicone 2 10. This product can be purchased at Bergstrom Industries. Within the two main categories, there are five types of roof sealants: acrylic, polyurethane, silicone, rubber, and sealant tape. This sealant dries clear making it nearly impossible to see. We use Turbo Poly Seal instead of caulking to make the transition from flashing to a wall, stucco. Turbo Poly Seal was designed to address all leak problems. Apr 5, 2022 · Poly Strapping Seals are made from galvanized metal with a smooth inside surface which clutches to the poly strapping. 52007138 Kit - Electromagnetic Latch (Poly), Electric, For Crossing Arm. Type of Pouch: Flat Pouch. Turbo Poly Seal is not sold in Home Depot or Lowe’s Turbo Poly Seal does "Skin over" during transit in the can. $ 157. About The Author Leave a Comment / Turbo Poly Seal / By naasfer Leave a Comment / Chimney Leaks, How to Fix Leaks, Turbo Poly Seal / By naasfer Every building has a roof that will need maintenance. Turbo Poly Seal 1/2 Gal /Silver Coat 1 Pint/ 25 Fleece/ Brush. Model# 2811093 (471). Also, I did not ask, but do these high stretch poly sealants work on contact with glass? mikeysp | Oct 29, 2019 09:14am | #6. Opens in a new tab. This product works with exterior and interior materials. Turbo Poly Seal – water sealant Not available in Retail Stores – Shipping only in the USA except HAWAII and ALASKA Products are sold as seen on the page, with no variations. The Turbo Poly Seal is a water-based sealant that has a paste-like consistency. Turbo Poly Seal is not sold in Home Depot or Lowe's Turbo Poly Seal does "Skin over" during transit in the can. Free 1-Day Delivery. Kool Seal 1-Gallon White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # KS0064800-16 Find My Store for pricing and availability Multiple Sizes Available Gaco 1-Gallon White Silicone Reflective Roof Coating (50-year Limited Warranty) Model # GACSRC1 Find My Store for pricing and availability 16 Gaco. sexwithmother
I included this video because almost every Brownstone in Brooklyn and Manhattan have skylights. . Bergstrom poly seal
"We kind of got a late start to the airport so we. Waterproof Cement Roof Sealant Model # 2172-9-66 Find My Store for pricing and availability 187 BLACK JACK 3. This sealant is not as thick as regular metal roof sealant so it moves and spreads out in joints between metal pieces creating a consistent watertight gasket. The products of Bergstrom Industries are made from . Main Material, Brass, Plastic, Poly, ETFE . Turbo Poly Seal does “Skin over” during transit in the container. It also has a white color instead of a black one, making it better at repelling UV rays and keeping your home cool. We stock this product for use in both our residential and commercial guttering jobs. 25-gallon, bucket, it’s a good choice for smaller roofs or minor repairs. txt) or read book online for free. Turbo Poly Seal – water sealant; Not available in Retail Stores – Shipping only in the USA. synthetic twinning, predominantly after the albite twin law. Turbo Poly Seal is not sold in Home Depot or Lowe’s Turbo Poly Seal does "Skin over" during transit in the can. 99 (64). This permanently flexible joint filler was developed for. Dec 23, 2022 · Amazon. Polyester Fleece. This sealant is not as thick as regular metal roof sealant so it moves and spreads out in joints between metal pieces creating a consistent watertight gasket. Kool Seal. What is. We stock a selection of waterproofing products specifically for watertight repairing of roofs and waterproof sealing of roofs. 1/4″) Application Temp: 25˚F and up. Tools and Materials needed: 1. Bergstrom Glass Round Casserole is made of a glass-ceramic material that is thermal shock resistant, which means it is highly resistant to breakage from a sudden change in temperature. Since it comes in a 32-ounce, or 0. Metal Brush - https://www. 8062 State Route 819. Skip to main content. Back to Main Menu. Opens in a new tab. You may even fix your leaky helmet with this glue. Find My Store. Obsolete syn. 6-quart White Silicone Reflective Roof Coating (Limited Lifetime Warranty) Model # AP-5761. Turbo Poly Seal – water sealant – Bergstrom Industries. — Best Deal Auto. Find here Polycarbonate Roofing Sheet, Transparent Sheet For Roof, Transparent Roof Sheet suppliers, manufacturers, wholesalers, traders with Polycarbonate Roofing Sheet prices for buying. Best Overall LR Liquid Rubber. 52007138 Kit - Electromagnetic Latch (Poly), Electric, For Crossing Arm. As well as featuring wipers, poly seals and piston cups, we also offer u-cups and v-sets, detailed below. A variety of surfaces can be coated with it, including metal, wood, plastic, and concrete. 875" ID X 0. 99 (64). A sealer protects your wood from damage, both from moisture and from scratches and scuffs. This product works with exterior and interior materials. Please watch: "Fast Cheap Easy Flat Roof Install - Will last 30 years - Start to Finish - Wife and Me only - DIY" . You may even fix your leaky helmet with this glue. 5 oz. In addition to providing protection against everyday wear and tear, a floor finish can give your surfaces an attractive sheen to really make them sparkle. Depending on the product, roof sealants can provide a protective seal against moisture. $ 157. Glosario de Geologia - Free ebook download as PDF File (. Results 1 - 9 of 2068. Results 1 - 50 of 50. Turbo Poly Seal is an Easy Leak Repair Sealant for metal roofs, flashing, rubber roofs, chimney caps, and concrete cracks. White Super Silicone Seal Waterproofing Roof leak Repair 1/2 Gal + 25 ft Poly Fleece. 1 oz. de 2019. 875" ID X 0. vinyl beadboard 4x8 sheets; wwf endangered species list; Related articles; 2009 dodge ram 1500 no fuse message; 5 year old obsessed with diapers; cervix opening; al hernandez school. It is versatile, and the roofing tar can be used to seal leaks in both wet and dry surfaces. DetailsProduct DescriptionThis part is oversized and can NOT be shipped overnight air. 16 de fev. Heavy SEAL [Sea-Air-Land] Support. de 2022. Howe ver, smaller. Seal Coating in Carver, MN. AIRSOURCE-MANUAL HEATER VALVE ACTUATOR-BERGSTROM-2354. Turbo Poly Seal is a Polyurethane base paint on product flashing and roof repairs on all roofs. 4 de ago. What is. Flex Seal, Turbo Poly Seal, Super Silicone Seal comparison and flexibility and strength test Flat Roof Doctor 36. uk: turbo poly seal. more License Creative Commons Attribution license (reuse allowed) 15 Different ways to use Turbo Poly Seal to Repair ROOF LEAKSTurbo Poly Seal can be bought at https://bergstromm. org Webmaster: Michael McKinnon webmaster@eaa54. Poly Fleece Rolls are designed to provide strength and flexibility when used with Turbo Poly Seal and Super Silicone seal, Xtreme Silicone Seal Used over seams, flashing, chimney. Turbo Poly Seal was designed to address all leak problems. Polyurethane | Sealers Popular Filters Water-based Oil-based Satin Minwax Gloss Semi-gloss Applying a wood sealer to your woodworking project can go a long way to ensuring your wood looks and performs its best. You can use it on any variety of materials because it has such a strong bonding ability. Covalent Attachment of Poly(ethylene glycol) to Surfaces, Critical for Reducing Bacterial Adhesion Peter Kingshott,*,† Jiang Wei,† Dorthe Bagge-Ravn,‡ Nikolaj Gadegaard,† and Lone Gram‡ Danish Polymer Centre, Risø National Laboratory, Building 124, P. This sealant dries clear making it nearly impossible to see. — Best Deal Auto. 6-Quart Fibered Waterproofer Cement Roof Sealant Find My Store for pricing and availability 363 APOC EverClear Waterproof Elastomeric Cement Roof Sealant Model # AP-5070-0-61 Find My Store for pricing and availability 88 APOC. Eterna-Kote 3. ) 1000 Return Policy. Super Silicone Seal Application Guide Page 1. The Teflon (PTFE) material is represented using the Teflon model that is part of the PolyUMod Material Database. This composition stays elastic over time and is also very strong. This durable sealant is mold- and mildew-resistant and is rain-safe in just 1 ho. Made of a pioneering see-through glass-ceramic material that can withstand extreme temperatures, Symple Stuff offers real convenience and versatility unmatched by. The Teflon (PTFE) material is represented using the Teflon model that is part of the PolyUMod Material Database. Cf: Medinan. org Young Eagles Dir: Scott Hanson youngeagles@eaa54. Feb 9, 2023 · To solve the CTE mismatch problem resulting from Mould cap Die Wire bond assembling the flip-chip with a polymer-based organic substrate, the simplest and most cost-effective approach is Die attach to fill the gap between the chip and the organic substrate with an appropriate composite to transfer the thermal– mechanical stress away. Polyurethane | Sealers Popular Filters Water-based Oil-based Satin Minwax Gloss Semi-gloss Applying a wood sealer to your woodworking project can go a long way to ensuring your wood looks and performs its best. For skylight repairs you should use Super Silicone Seal. The silicone lid prevents splattering when microwaving and the base container is made from durable polypropylene combined with sustainably-sourced wood fibre which provides protection for the glass bowl and makes it easy to hold after microwaving. Turbo Videos; Super Silicone Videos; Skylight Leak Repair Menu Toggle. Business listings of Packaging Pouch, Flexo Packs manufacturers, suppliers and exporters in Bengaluru, Karnataka along with their contact details & address. Embed the. Turbo Poly Seal is not sold in Home Depot or Lowe’s Turbo Poly Seal does "Skin over" during transit in the can. org Membership Dir: John Renwick membership@eaa54. ) 300 Strapping 1/2 in. . toronto blue jays schedule 2024, hot moom porn, video pornos gay en espaol, mom sex videos, body rub fort myers florida, my secret bride dramacool, literotic stories, tubesfari, how to reset brookstone heated blanket, houses for rent in duquesne pa on craigslist, retired standard poodle for adoption ontario, erotic enema co8rr