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ORIGIN PRO COMPARE
Origin Pro HP4 vs. Sika® Sikaflex® NP 1
Compared with
Sika® Sikaflex® NP 1
At a Glance
HP4 and Sikaflex NP 1 are professional ASTM C920 sealants used for exterior joints, siding, windows and roofing. Sikaflex NP 1 is a Class 35 polyurethane with broad commercial uses, while HP4 is a Class 25 hybrid polymer designed around efficient siding, window and trim installation. HP4 publishes faster skin and cure times and offers a substantially broader manufacturer color-matching program.
| What Matters on the Job | Origin Pro HP4 | Sika® Sikaflex® NP 1 |
|---|---|---|
| ASTM C920 Classification | ✓ Yes - Class 25 | ✓ Yes - Class 35 |
| Skin Formation Within 20 Minutes | ✓ Yes - 15-20 minutes | ✕ No - overnight or within 24 hours |
| Published Cure of 24-72 Hours | ✓ Yes - 24-72 hours | ✕ No - approximately 1 week |
| No 24-Hour Cold Conditioning | ✓ Yes | ✕ No - room-temperature storage required for 24 hours in cool or cold weather |
| 3,500+ Manufacturer Color Matches | ✓ Yes | ✕ No - 12 standard colors |
View Detailed Specifications
| Attribute | Origin Pro HP4 | Sika® Sikaflex® NP 1 |
|---|---|---|
| Sealant Technology | Advanced hybrid polymer (SMP / MS polymer) | One-component moisture-curing polyurethane |
| ASTM C920 Classification | Class 25 | Class 35 |
| Movement Capability | ±25% | ±35% |
| Application Temperature | 0°F to 120°F | Exact range not stated; below-freezing application permitted only on completely dry, clean substrates; contact Sika Technical Service |
| Service Temperature | -40°F to 200°F | -40°F to 180°F |
| Skin Formation | Approximately 15-20 minutes | Overnight or within 24 hours at 75°F and 50% RH |
| Tack-Free Time | Approximately 30-60 minutes | Passes ASTM C679; elapsed time not published |
| Complete Cure | 24-72 hours | Approximately 1 week at 75°F and 50% RH |
| Application Surface Condition | Can be applied to clean, damp surfaces after standing water is removed. Do not apply to saturated substrates. | Structurally sound, fully cured, dry and clean |
| Cool-Weather Preparation | No 24-hour room-temperature conditioning stated | Store container at room temperature for at least 24 hours before use in cool or cold weather |
| Shrinkage | 0% | None |
| Paintable | Paintable after skin formation; test paint compatibility before finishing. | Compatible with non-rigid coatings and can be painted; on-site compatibility testing required |
| Packaging | 10.1 fl oz plastic cartridge | 10.1 fl oz cartridges and 20 fl oz ProPaks |
| Cartridge Construction | Plastic cartridge | Not stated in published TDS |
| Nozzle Options | V-notch nozzle and standard 4.25-inch nozzle | Standard cartridge nozzle sized for the joint |
| Colors | 36 chart colors; 3,500+ manufacturer color matches | 12 standard colors |
| Published Applications | Windows, doors, siding, trim and exterior transitions | Interior/exterior joints, window frames, roofing, fascia, parapets, vinyl siding, storefronts, immersion and acoustic sealing |
| Direct Online Ordering | Yes - through Origin Pro | Available through Sika sales channels |
| Pro Dashboard Tools | Yes - pricing, saved colors, projects and order history | No comparable Sika account dashboard identified |
Published manufacturer specifications are shown as stated in the applicable technical data sheets.
Differences You Will Notice
Both HP4 and Sikaflex NP 1 are professional ASTM C920 sealants used for exterior joints, siding, windows and roofing. Sikaflex NP 1 is a Class 35 polyurethane with broad commercial, immersion and acoustic applications; HP4 is a Class 25 hybrid polymer designed around siding, window and trim workflows. On the job, HP4 skins in approximately 15-20 minutes and publishes a 24-72 hour cure, while Sikaflex NP 1 skins overnight or within 24 hours and cures in approximately one week. HP4 also requires no 24-hour room-temperature conditioning in cool weather and offers 3,500+ manufacturer color matches. Origin Pro makes buying easier through direct online ordering and Pro Dashboard tools for pricing, saved colors, projects and past orders.
Beyond the Product
Origin Pro’s Pro Dashboard makes buying simpler, faster and more organized. See pricing before you order, find and save color matches, track projects and past orders, and quickly reorder—all in one place.
Product Comparison Information
These comparisons are intended to help contractors evaluate differences in product features and manufacturer-published specifications when considering products for a particular application. Unless expressly stated, Legacy Sealants, Inc. has not conducted head-to-head testing of the referenced products. Information is drawn from manufacturer technical literature identified on the page and was available as of the date shown. Because test methods and conditions may differ by manufacturer, published values should not be treated as directly equivalent unless specifically noted.
Product names, trademarks, packaging and images are the property of their respective owners and are used solely to identify the products being compared. Legacy Sealants, Inc. is not affiliated with, sponsored by or endorsed by any referenced manufacturer.
Product formulations and specifications may change. Users should review current manufacturer technical literature and independently determine product suitability for their specific application.
Trademark Ownership
Sika® and Sikaflex® are registered trademarks of Sika AG and are used by Sika Corporation.
Technical Literature
Origin Pro HP4 High Performance Hybrid Polymer Sealant Technical Data Sheet, version dated September 24, 2026. Sikaflex® NP 1 Product Data Sheet, August 2025, Version 02.04, Sika Corporation, document 020511000000002006. The Origin Pro and Sika product pages were reviewed September 24, 2026 for current product and ordering information.