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Secure Start® Plus 10-Square Roll Felt Underlayment
- Mfg.#
- RL05MLSSPLUS
- Sku#
- 3898400
- Anti-skid surfaces, top and bottom
- Lays flat, straight, and wrinkle free
- UV exposure up to 90 days
- UL Class A Fire Rated when installed with a Fire Rated Roof Covering
- 100% recyclable
* Estimated stock levels as of Tue, Apr 14, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.
Description
Secure Start® Plus is a lightweight, synthetic underlayment designed with anti-skid technology, which securely holds the underlayment in place and provides a more walkable surface for greater installation safety.
Our most popular underlayment for asphalt shingles, Secure Start® Plus also works well for tile, wood, and metal roofing applications.
Underlayment sits under the shingle and provides a vapor barrier covering the entire roof. Malarkey offers four underlayments tailored to asphalt shingle roofs.
Specifications
General
| Application | For steep slope roofing applications |
|---|---|
| Collection | Secure Start® Plus |
| Color | Black |
| Color Family | Black / Gray |
| Coverage | 1000 sq ft |
| Fire Rating | Class A |
| Material | Polypropylene |
| Tear Strength | 20 MD / 23 CD |
| Type | Synthetic Roof Underlayment |
Dimensions
| Length | 250 ft |
|---|---|
| Square Feet | 1000 |
| Thickness | 17 +/-1 mil |
| Weight | 32 lb |
| Width | 48 in |
Manufacturing Details
The following information is subject to change without notice
| Country of Origin | USA |
|---|---|
| Manufacturer Warranty | 10 yr Limited |
| Prop 65 Warning |
WARNING: This product can expose you to chemicals, including bitumen, which is known to the State of California to cause cancer. For more information go to: www.P65Warnings.ca.gov.
|
| Shop USA | Yes |
Label Information
| Certification, Codes, Standards | ASTM D226 Types I & II, ASTM D4869 Types II & IV, ASTM D8257, CCRR-1082 ASTM E108 CLASS A FIRE RATING, CAN/CSA A123.3, FBC APPROVAL - FL23186 |
|---|
Videos
Related Documents
Brochure (PDF)
Msds (PDF)
Warranty (PDF)
Installation Guide (PDF)
