Gruen Inside Corners
Gruen 90° Inside Corners – Preformed Waterproofing Corners for Leak Prevention
Key Features & Benefits
- Preformed & Seamless: No cutting or shaping required—ensures perfect corner coverage.
- Superior Waterproofing: Prevents leaks, mold growth, and moisture damage in wet areas.
- Heavy-Duty Fabric: 4-mil thick for long-lasting performance and flexibility.
- Universal Compatibility: Works with waterproofing membranes, thin-set mortars, and tile adhesives.
- Quick & Easy Installation: Pre-molded design simplifies application for professionals and DIYers alike.
Product Information
Product Information
Shipping & Returns
Shipping & Returns

Gruen Inside Corners
Gruen Inside Corners
Gruen 90° Inside Corners – Preformed Waterproofing Corners for Leak Prevention
Key Features & Benefits
- Preformed & Seamless: No cutting or shaping required—ensures perfect corner coverage.
- Superior Waterproofing: Prevents leaks, mold growth, and moisture damage in wet areas.
- Heavy-Duty Fabric: 4-mil thick for long-lasting performance and flexibility.
- Universal Compatibility: Works with waterproofing membranes, thin-set mortars, and tile adhesives.
- Quick & Easy Installation: Pre-molded design simplifies application for professionals and DIYers alike.
$7.00
Original: $19.99
-65%Gruen Inside Corners—
$19.99
$7.00Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Gruen 90° Inside Corners – Preformed Waterproofing Corners for Leak Prevention
Key Features & Benefits
- Preformed & Seamless: No cutting or shaping required—ensures perfect corner coverage.
- Superior Waterproofing: Prevents leaks, mold growth, and moisture damage in wet areas.
- Heavy-Duty Fabric: 4-mil thick for long-lasting performance and flexibility.
- Universal Compatibility: Works with waterproofing membranes, thin-set mortars, and tile adhesives.
- Quick & Easy Installation: Pre-molded design simplifies application for professionals and DIYers alike.















