--- product_id: 532575340 title: "Rolled Mastic Duct Sealants Foils 3'' X100" brand: "hardcast" price: "€ 116.37" currency: EUR in_stock: true reviews_count: 5 category: "Hardcast" url: https://www.desertcart.be/products/532575340-rolled-mastic-duct-sealants-foils-3-x100 store_origin: BE region: Belgium --- # 3'' x 100' length for extensive coverage UL 181B-FX flame spread classified High adhesion foil for metal ductwork Rolled Mastic Duct Sealants Foils 3'' X100 **Brand:** hardcast **Price:** € 116.37 **Availability:** βœ… In Stock ## Summary > πŸ”₯ Seal smart, save energy, and stay safe with every roll! πŸ› οΈ ## Quick Answers - **What is this?** Rolled Mastic Duct Sealants Foils 3'' X100 by hardcast - **How much does it cost?** € 116.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/532575340-rolled-mastic-duct-sealants-foils-3-x100) ## Best For - hardcast enthusiasts ## Why This Product - Trusted hardcast brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Long-Lasting Adhesion:** Sticks like premium roofing tape for reliable performance - β€’ **Made in USA Quality Assurance:** Trusted craftsmanship for professional results - β€’ **UL Classified Flame Spread Safety:** Certified for safe indoor/outdoor use - β€’ **Precision Seal for Energy Efficiency:** Stops air leaks to save on HVAC costs - β€’ **Durable Foil with Superior Flexibility:** Molds over sharp metal edges without ripping ## Overview Rolled Mastic Duct Sealants Foils 3'' X100 is a UL-classified, high-adhesion silver foil tape designed for sealing HVAC ductwork. Measuring 3 inches by 100 feet, it offers durable, flexible coverage that molds over sharp metal edges without tearing. Ideal for indoor and outdoor use, this flame spread rated tape ensures energy efficiency by preventing air leaks and is proudly made in the USA for professional-grade reliability. ## Description G80-192 and G80-193 are red printed and UL classified for flame spread G80-325 and G80-326 are UL 181B-FX listed for use on flexible duct systems G80-194 and G80-195 are for higher pressure applications up to 10" w.g. Application: Indoor/Outdoor; Carton Qty.: 16; Description: Silver Foil Grip β€” Printed; Mfg. #: AFG-1402-3; Size: 3" x 100' Review: Unbelievable! This is absolutely the best mastic foil tape for metal ductwork. I have used so many different duct tapes in my life. This is well worth the cost. I just finished taping my sister-in-law's microwave ductwork. This stuff does not rip from the sharp edges of the metal. It molds over the edges and is super sticky. I did not feel any air escaping when I tested the microwave's exterior exhaust fan after completing the taping. It is sticky like the peal and stick used on roofs. Review: This mastic HVAC tape is ideal for sealing leaks in the furnace area. We were wasting energy in both summer and winter by these leaks. The tape is easy to apply and it adheres securely. The other tape we used said it was for hvac applications but it wasn't mastic and was falling off. Best of all this is a quality product made in USA. Worth every penny! ## Features - Package Dimensions: 18.034 cms (L) x 17.272 cms (W) x 18.034 cms (H) - Product Type: Tools - Package Quantity: 1 - Package Weight: 4.03 lbs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005ZVJM1M | | Batteries Required? | No | | Batteries included? | No | | Colour | Sliver | | Customer Reviews | 4.7 4.7 out of 5 stars (220) | | Date First Available | 26 Oct. 2011 | | Item Package Quantity | 1 | | Item Weight | 1.35 kg | | Item model number | 638532806335 | | Manufacturer | hardcast | | Material | Foil Tape | | Measurement System | Imperial | | Part Number | 638532806335 | | Product Dimensions | 20.32 x 20.32 x 7.62 cm; 1.35 kg | | Special Features | Printed | | Style | Compact | ## Images ![Rolled Mastic Duct Sealants Foils 3'' X100 - Image 1](https://m.media-amazon.com/images/I/61LFil37TSL.jpg) ![Rolled Mastic Duct Sealants Foils 3'' X100 - Image 2](https://m.media-amazon.com/images/I/61OK5FOW4PL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by T***4 on 13 February 2025* Unbelievable! This is absolutely the best mastic foil tape for metal ductwork. I have used so many different duct tapes in my life. This is well worth the cost. I just finished taping my sister-in-law's microwave ductwork. This stuff does not rip from the sharp edges of the metal. It molds over the edges and is super sticky. I did not feel any air escaping when I tested the microwave's exterior exhaust fan after completing the taping. It is sticky like the peal and stick used on roofs. ### ⭐⭐⭐⭐⭐ Review *by R***B on 23 July 2025* This mastic HVAC tape is ideal for sealing leaks in the furnace area. We were wasting energy in both summer and winter by these leaks. The tape is easy to apply and it adheres securely. The other tape we used said it was for hvac applications but it wasn't mastic and was falling off. Best of all this is a quality product made in USA. Worth every penny! ### ⭐⭐⭐⭐⭐ Review *by M***E on 14 July 2025* Why did you pick this product vs others?: I have used this brand before and it’s good quality ## Frequently Bought Together - Rolled Mastic Duct Sealants Foils 3'' X100 - Red Devil 0841DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 1 Gallon, Gray, Made in USA - Hardcast 304099 Foil-Grip 1402 Mastic Duct Sealant 2" x 100' --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/532575340-rolled-mastic-duct-sealants-foils-3-x100](https://www.desertcart.be/products/532575340-rolled-mastic-duct-sealants-foils-3-x100) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-05*